Closed Bug 1267137 Opened 9 years ago Closed 9 years ago

The animated SVG font demo is flickering with layers.acceleration.force-enabled=true

Categories

(Core :: Graphics: Layers, defect)

Product:
Core
Component:
Graphics: Layers
Version:
45 Branch
Type:
defect
Priority:
Not set
Severity:
normal

Tracking

()

Status:
RESOLVED WORKSFORME

People

(Reporter: u555135, Unassigned)

References

Details

(Whiteboard: [gfx-noted])

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0 Build ID: 20160413010702 Steps to reproduce: The demo of an animated SVG font with a bouncing soccer ball (https://people.mozilla.org/~jkew/opentype-svg/soccer.html) is flickering. I don't know if this issue is specific to my computer or not. Actual results: The text "Anyone for SOCCER?" on the page flickers rapidly between black and white. The rate of flickering seems to vaguely depend on overall system load (it flickers slower when the system is more heavily loaded). All of the text flickers, not just the novelty "o" and "O" glyphs. The "normal" glyphs have more visible flickering than the animated soccer balls. Expected results: The demo should animate only the "o" and "O" glyphs. The rest of the text should not flicker.
Looking into this, the problem seems to be due to setting "layers.acceleration.force-enabled" to true. I realize this is not really supported, but: a) I had this set for quite a while and nothing else seems to be broken. b) "I swear it worked before." Before I upgraded my computer from an ancient Ubuntu 14.10 to Debian Unstable, I don't recall having this problem. c) I can make the flickering stop by opening three Firefox windows and loading the same demo URL in all three of them. Feel free to close if you don't feel this is supported.
Does it work normally with previous versions of Firefox?
Component: Untriaged → Graphics: Layers
Flags: needinfo?(rqou)
Product: Firefox → Core
Summary: The animated SVG font demo is flickering on my computer → The animated SVG font demo is flickering with layers.acceleration.force-enabled=true
Testing it again, I'm not sure it ever worked fully "normally," but the flickering seems to have gotten a lot worse on FF 40. On FF 39 and below, the page seems to flicker on initial load and only occasionally afterwards. On FF 40 and newer, the page seems to continue flickering.
Flags: needinfo?(rqou)
Further testing, it seems FF 46 beta 11 has fixed/perturbed the bug away. Feel free to close now if necessary.
Blocks: ogl-linux-beta
Whiteboard: [gfx-noted]
Status: UNCONFIRMED → RESOLVED
Closed: 9 years ago
Resolution: --- → WORKSFORME
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